- Aleskandar Aleksandrov
- Angel Dimitrov
- Assoc. prof. dr Todor Trifonov
- Assoc. prof. Efrosima Zaneva-Dobranova
- Assoc. Prof. Georgi Nikolov
- Captain Branimir Trifonov
- CNG Ecogas AD
- Dr. eng. Liybomir Gerov
- Emil Tsanov
- Eng. Marin Marinov
- Gas-energy company - Elin Pelin Ltd.
- Gastec BG AD
- Georgi Jaigarov
- HTI Bulgaria
- Infrastroeji Ltd.
- Kameno Gas Ltd.
- Lubomir Denchev
- Lubtcho Rusev